I have 24ft ag vinyl pool, about 12000 gallons.

I have an algae problem so I am shocking the pool.

But before I started, I was surprised to see my ph at 8.2. It has always stayed at 7.2 for the last 3 years.

my numbers
fc 8.5
cc .5
ph 8.2
alk 90
cya 20


I was going to wait until I got rid of the algae before I started worrying about the ph. I was just surprised that ph went way up.

I added 2 3/4 jugs of bleach after this reading that should get me up to 16ppm

I will keep the fc up and hopefully that will get rid of the algae. I only have a week or two of swimming anyway. (water temp is 76 today). Which is also why I'm not going to bother increasing my cya.


Anyway, I'm interested in hearing about why my ph went up from all you experts.

---Dale